Explanation: TCP/IP (Transmission Control Protocol/Internet Protocol) is the core protocol that powers the Internet.

It enables devices to communicate over networks and ensures data is transmitted accurately.

TCP handles data transmission reliability, while IP manages addressing and routing.


Other Options Explained:

(A) SLIP (Serial Line Internet Protocol) – An outdated protocol for dial-up connections.

(B) HTTP (HyperText Transfer Protocol) – Used for web browsing, not the core Internet protocol.

(D) PPP (Point-to-Point Protocol) – Used for direct dial-up connections, not for the Internet as a whole.


Thus, the correct answer is (C) TCP/IP.